$ADD = "";
// Skip loading extensions
-if ((!mxchange_installed) || (mxchange_installing)) return;
+if ((!isBooleanConstantAndTrue('mxchange_installed')) || (isBooleanConstantAndTrue('mxchange_installing'))) return;
// Load default sql_patches extension if present
if (file_exists(PATH."inc/extensions/ext-sql_patches.php") && is_readable(PATH."inc/extensions/ext-sql_patches.php"))